/Engine/Plugins/Experimental/MeshModelingToolsetExp/Source/MeshModelingToolsEditorOnlyExp/Public/ISMEditorTool.h
class FISMEditorSelectionChange : public [FToolCommandChange](API\Runtime\InteractiveToolsFramework\FToolCommandChange)
TArray<UISMEdi...
NewSelection
TArray<UISMEdi...
OldSelection